Watch the 'Cat And Tie' parody of Justin Timberlake's track below: Other stars appearing at the Ball this year include Robbie Williams, Will.i.am, Taylor Swift and Jessie J.

Cat wore a two piece suit and tie from Zara. 3. Cat's co-host Ben Shephard made a dig at Cat's unique look. ... While another wrote: "Has Cat borrowed a suit off her dad #thismorning." ...